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Literature DB >> 10809693

Interplay between efflux pumps may provide either additive or multiplicative effects on drug resistance.

A Lee¹, W Mao, M S Warren, A Mistry, K Hoshino, R Okumura, H Ishida, O Lomovskaya.

Abstract

The effects of simultaneous expression of several efflux pumps on antibiotic resistance were investigated in Escherichia coli and Pseudomonas aeruginosa. Several combinations of efflux pumps have been studied: (i) simultaneous expression of a single-component efflux pump, which exports antibiotics into the periplasm, in combination with a multicomponent efflux pump that accomplishes efflux directly into the external medium; (ii) simultaneous expression of two single-component pumps; and (iii) simultaneous expression of two multicomponent pumps. It was found that when efflux pumps of different structural types were combined in the same cell (the first case), the observed antibiotic resistance was much higher than that conferred by each of the pumps expressed singly. Simultaneous expression of pairs of single-component or multicomponent efflux pumps (the second and third cases) did not produce strong increases in antibiotic resistance.

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Year: 2000 PMID： 10809693 PMCID： PMC94500 DOI： 10.1128/JB.182.11.3142-3150.2000

Source DB: PubMed Journal: J Bacteriol ISSN： 0021-9193 Impact factor: 3.490

39 in total

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